Pen



FIG. 1 is a top plan view of the pen of my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a top plan view of the pen body with the cap member removed for convenience of illustration;

FIG. 7 is a typical side elevational view of FIG. 6; and,

FIG. 8 is a bottom plan view of FIG. 6. 

The ornamental design for a pen, as shown and described. 